Brake shoe



Patented Q21. 9, 1923.

ll i if.

stares CLIFTON D. PETTIS, OF NEW YORK, N. Y.

BRAKE sHoE.

Application filed September 2, 1922. Serial No. 585,901.

To all wllom it may concern:

it known that I, CLIFTON D. Pnr'ris, a citizen of the United States and a resident of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Brake Shoes, of which the following is a specification. 1 i This invention relates to brake shoes but more particularly to ductile metal attaching lugs for securing the reinforcing back to the brake head and as for its primary object to provide an article of this nature which is strong and durable in construetionand can be economically produced.

The many other objects and advantages will be better understood by reference to the following specification when considered in connection with the accompanying drawing illustrating selected embodiments thereof in which t i F 1 is a plan view of the blank from which the lug is formed.

Fig. 2 is a plan view of Fig. 3 is a transverse section 3-43 of Fig. 2.

Fig. 4. is a plan view of the blank for a modified form of lug. a

F 5 is a plan. view of the finished lug formed from the blank shown in Fig. 4, and Fig. (3 is a transverse section on. the line 6-43 of F ig. 5.

Referring to the drawings, a blank 1.0 in the fori'n shown in Fig. 1 is preferably stamped from a sheet of tough ductile metal. This blank is then pressed by suitable dies into the shape shown in Figs. 2 and 3 which is the finished lug 11. In this pressing operut ion the end wa ls 12 are bent downwardly relative to the top 1.3 on the lines 14c. The wings in are bent upwardly or outwardly relative to their respective end walls on the lines 16. The locking flange 17 on each. of the wii i5 is bent outwardly on the line .18. When the parts are bent in the manner described, the ends 19. 19 of the flanges 17 ahut as do the ends 20, 20. These abutting ends may be welded together. Slots 21 are formed in the end walls and adjoining wings of the-blank it) that. when the lug is formed. in the manner described, the oppositely disposed notches 22 in the wings on one side of the end walls form a slot 23. Similarly the notches 24 on the opposite side of these end walls form a slot 25 and the slots 23 and 25 the finished lug.

on the line are in. alineinent; In the assembling of the brake shoe, the reii endwise through the alined slots 23 and 25 sui lciently to bring the lug into proper position relative to the back. A keyway opening 21" is formed by the end walls and the top. The flanges 17 preferably retain the reinforcing back 26 against the base edge of the end walls 12. v

In the modified form of the invention shown in Figs. i to 6, the blank (Fig. a) is quite similar to that of the previous embodiment (Fig. 1). Instead of forming the slots (21) above the bending line (18) as in the previous embodiment, the corresponding slots 35. are below the bending line 36 in the blank. The portions 37 of the flanges 38 are deru'essed on the-lines The reinforcing heel-":40 is notched on each of its side edges as at 41 and the bent down portions 42 of the flanges 38 pass through the notches. The portions 37 of the flanges 38 underlie the back 40 and retain the same against the base edges of the end walls of the lug. The ends of the flanges preferably abut as in the previous embodiment. In the forming of the lug the portions 37 of the flanges are initially bent downwardly to substantially a right angle. to the remaining outer portion of these flanges. The lug is placed upon the back from above with the portions 37 sliding downwardly in the notches l1 until the base edges of the end walls come into contact with the top face of the plate. The portion of the flanges below the back are then bent inwardly and upwardly until they contact with the under face of the back.

.ll/Iy improved lug does not require any m sits.

rcing back 26 is slid slotting of the reinforcing back and therefore this back is not weakened. The winged construction of the lug with the wide slots extending into the wings. permits the use of a broad reinforcing back and still leaves adequate metal throughout to give the necessary strength. Tn the construction shown in Figs. 1 to 3 of the dra-win the lug is free to move longitudinally of the reinforcing back until the body of the shoe is cast thereon. This body securely locks the lug and back together. In the construction shown in Figs. 4- to 6, the passage of the flanges throinrh the notches ll locks the lug securely in position on the reinforcing back before the body is cast.

It is obvious from the foregoing description that my improved lug is exceedingly simple, strong and durable in construction,

- and may be economically roduced.

I am aware that the orm and arrangement of the parts may be considerably va ried without departing from the spirit of my invention and I reserve the right to make all such as fairly fall within the scope of the following claims.

I claim as my invention:

1. in a brake shoe, the combination with a reinforcing back, of an attaching lug including a substantially U-shaped body portion having oppositely extending wings projecting from the edges thereof and attaching members on said wings.

2. In a brake shoe, the combination with a reinforcing back, of an attaching lug including a substantially U-shaped body portion having oppositely extending wings prov jecting from the edges thereof beyond the corres 'ionding side edges of said back and attaching members on the outer portion of each of said wings.

3. In a brake shoe, the combination with a reinforcing back, of an attaching lug including top and end walls, wing flaps on said end walls bent at substantially a right angle thereto and attaching members on said wing flaps.

4-. In a brake shoe, the combination with a reinforcing back, of an attaching lug including top and end walls, wing flaps on the side edges of said end walls bent outwardly and projecting beyond the corresponding side edges of said back, and attaching members onthe outer portion of said wing flaps.

5. In a brake shoe, the combination with a reinforcing back, of an attaching lug including a substantially U-shaped body portion having wings formed on the side edges of the upstanding walls thereof and bent outwardly to substantially a right angle to said walls, said wings being provided at their outer end portions with attaching members embracing said back.

6. In a brake shoe, the combination with a reinforcing back, of an attaching lug including a substantially U-shaped body portion having wings formed on the side edges of the upstanding walls thereof and bent outwardly to substantially a right angle to said walls, said wings extending beyond the corresponding side edges of said back and being provided at their outer end portions with attaching members extending downwardly and inwardly therefrom beneath said back.

7. A brake shoe lug comprising a substantially U-shaped body having wings formed on the side edges of the upstanding walls thereof and bent outwardly to substantially a right angle to said walls, and an attaching flange extending downwardly and then inwardly from the outer portion of each of said wings with its inner end substantially abutting the inner end of the corresponding flange on the opposite wing.

CLIFTON D. PETTIS. 

